IBM RS/6000 SP, Maintenance Information

Page: 41 / 388

MAP 0120: Supervisor Bus Problem
012 (continued)
– Check frame supervisor LED #4 (top yellow LED) and LED #6 (if twin-tail).
Is frame supervisor LED #4 or LED #6 (twin-tail) flashing?
Yes No
013
– Go to Step 053 on page 1-29.
014
– Go to Step 015.
015
Attention: Powering off processor node(s) or switch assemblies in a parallel environment may cause all
jobs to flush from the queue and switch initialization to rerun.
Attention: If this frame contains processor node(s), they should be removed from active configuration
before continuing. If processor node(s) are off, continue; otherwise, ask customers to initiate shutdown
procedure and power-off processor node(s) from the control workstation, or defer maintenance until all
jobs are completed.
Attention: If this frame contains switch assemblies, powering off switch assemblies will impact the entire
switch network.
– Check with customer to see if you can power off all the processor node(s) and/or switch assemblies in
this frame at this time.
Can you power off all processor node(s) and/or switch assemblies in this frame at this time?
Yes No
016
Cannot perform complete isolation at this time.
– Replace the frame supervisor card (refer to "FRU Removals and Replacements" in
IBM RS/6000
SP: Maintenance Information, Volume 3, Locations and Service Procedures).
– Check frame supervisor LED #4 (top yellow LED) or frame supervisor LED #6 (if a twin-tail frame
supervisor card is being used).
Is frame supervisor LED #4 or LED #6 (twin-tail) flashing?
Yes No
017
– Go to Step 053 on page 1-29 to verify fix.
018
Requires further isolation.
– Schedule time with customer to complete service. You can resume service at Step 019 or “MAP
0100: Start of Service Call” on page 1-4.
019
(Step 019 continues)
Chapter 1. Maintenance Analysis Procedures (MAPs)
1-21